US4158717A - Silicon nitride film and method of deposition - Google Patents

Silicon nitride film and method of deposition Download PDF

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US4158717A
US4158717A US05/768,659 US76865977A US4158717A US 4158717 A US4158717 A US 4158717A US 76865977 A US76865977 A US 76865977A US 4158717 A US4158717 A US 4158717A
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silicon nitride
film
azs
deposition
vapor
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Norvell J. Nelson
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Novellus Systems Inc
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Varian Associates Inc
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
    • H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
    • H01L21/02104—Forming layers
    • H01L21/02107—Forming insulating materials on a substrate
    • H01L21/02109—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates
    • H01L21/02112—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer
    • H01L21/02123—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing silicon
    • H01L21/0217—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing silicon the material being a silicon nitride not containing oxygen, e.g. SixNy or SixByNz
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
    • C23C16/22—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the deposition of inorganic material, other than metallic material
    • C23C16/30—Deposition of compounds, mixtures or solid solutions, e.g. borides, carbides, nitrides
    • C23C16/34—Nitrides
    • C23C16/345—Silicon nitride
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
    • C23C16/44—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating
    • C23C16/50—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating using electric discharges
    • C23C16/505—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating using electric discharges using radio frequency discharges
    • C23C16/507—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating using electric discharges using radio frequency discharges using external electrodes, e.g. in tunnel type reactors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
    • H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
    • H01L21/02104—Forming layers
    • H01L21/02107—Forming insulating materials on a substrate
    • H01L21/02109—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates
    • H01L21/02205—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates the layer being characterised by the precursor material for deposition
    • H01L21/02208—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates the layer being characterised by the precursor material for deposition the precursor containing a compound comprising Si
    • H01L21/02219—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates the layer being characterised by the precursor material for deposition the precursor containing a compound comprising Si the compound comprising silicon and nitrogen
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10F—INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
    • H10F77/00—Constructional details of devices covered by this subclass
    • H10F77/30—Coatings
    • H10F77/306—Coatings for devices having potential barriers
    • H10F77/311—Coatings for devices having potential barriers for photovoltaic cells
    • H10F77/315—Coatings for devices having potential barriers for photovoltaic cells the coatings being antireflective or having enhancing optical properties
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
    • H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
    • H01L21/02104—Forming layers
    • H01L21/02107—Forming insulating materials on a substrate
    • H01L21/02225—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer
    • H01L21/0226—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process
    • H01L21/02263—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process deposition from the gas or vapour phase
    • H01L21/02271—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process deposition from the gas or vapour phase deposition by decomposition or reaction of gaseous or vapour phase compounds, i.e. chemical vapour deposition
    • H01L21/02274—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process deposition from the gas or vapour phase deposition by decomposition or reaction of gaseous or vapour phase compounds, i.e. chemical vapour deposition in the presence of a plasma [PECVD]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy

Definitions

  • the invention pertains to film coatings which may be used, inter alia, for insulating, passivating, protecting or reducing reflections at the surface of semiconductive devices.
  • Silicon nitride (SI 3 N 4 ) has become well-known as an insulating and passivating layer for semiconductive devices. Such films are described in the "Handbook of Electronic Materials” Vol. 3, J. T. Milek, Ed. IFI/Plenum, New York (1971). The use of silicon nitride passivating films formed at low temperature to avoid damaging the device is described in "Nitride Film Seals at Low Temperature", Electronics 49, No. 5, page 40 (1974).
  • SiH 4 silane
  • nitrogen or a gaseous nitrogen compound such as ammonia
  • FIG. 1 is a schematic diagram of a laboratory apparatus for carrying out the inventive process.
  • FIG. 2 is a schematic cross-section of a photovoltaic cell embodying the inventive film.
  • AZS azidotrimethylsilane
  • CH 3 vaporizable silicon-nitrogen compounds
  • AZS is a stable compound which does not react with air or water, and is non-explosive. Its vapor pressure is suitable for room temperature operation of the process.
  • FIG. 1 is a diagram of the apparatus used.
  • the device 6 to be coated is placed on a holder 8 inside a vacuum furnace tube 10, as of quartz.
  • Tube 10 is closed at its open end by a metallic base 12 with a synthetic rubber O-ring 14.
  • the tube 10 is pumped to a good vacuum through port 16 and valve 18 by a conventional vacuum pumping system 20, shown schematically.
  • valve 22 is opened, connecting tube 10 to a reservoir vessel 24 containing liquid AZS 26.
  • the AZS vapor 28 is admitted to the reaction tube 10 to a pressure of 0.15 to 0.20 torr.
  • Support block 8 is made of graphite and is heated by a radiant heat lamp 30 outside the tube, thereby heating device 6 to the desired temperature. Temperatures from 100-400 degrees Celsius have been found to be desirable.
  • the deposition rate is also dependent on the substrate temperature, so for reproducible deposition the temperature is preferably controlled. For particular devices comprising tin-soldered contacts, I have found temperatures below 230 degrees to be necessary.
  • the temperature of block 8 is measured by a thermocouple 32 connected to block 8 whose coaxial leads 34 connect to an external temperature meter 36.
  • An electric plasma discharge is formed by applying voltage from a generator 38 of high frequency, such as 13MHz, between the thermocouple lead 34 connecting to support block 8 and an external metallic electrode 40.
  • the AZS is decomposed in the plasma discharge, depositing a film of silicon nitride on the exposed surface of the device 6. For a film thickness of 0.1 microns, about 10 minutes is required with a discharge estimated as 10 watts and 200 degree substrate temperature.
  • the film produced is exceedingly dense, smooth and free of defects. Surprisingly, these films are chemically more stable than those produced by chemical-vapor-deposition (CVD) or by the aforementioned plasma vapor deposition from mixtures of silane and ammonia.
  • CVD chemical-vapor-deposition
  • the AZS films are not etched by solutions of hydrofluoric or phosphoric acid, but other silicon nitride films are attacked by them. It is possible that the unexpected chemical inertness of the AZS films is due to the incorporation of methyl (CH 3 ) groups. Some evidence of the presence of methyl groups has been found by an infrared band attributable to the silicon-methyl bond. The improved performance may also be connected with the absence of oxide contaminants such as are readily produced by the reactive silanes. Regardless of the exact chemical mechanism, I have found that my AZS process results in a uniquely stable film not producible by any other process known to me.
  • azidotrimethylsilane is a well suited material for carrying out the invention.
  • other vaporizable organosilicon compounds may well be used.
  • a compound should be selected which does not have silicon-hydrogen bonds because the latter contribute to high reactivity and instability. It is very convenient to have the nitrogen source in chemical combination with the silicon because this eliminates any problem of metering the two components of the silicon nitride. However, it is believed that a separate source of nitrogen, if properly controlled, could produce the desired result.
  • my AZS vapor the silicon is bonded only to nitrogen and to the carbon atoms of the methyl groups. Other organic radicals could be substituted for the methyl groups, as long as the vapor pressure does not become too low.
  • FIG. 2 shows an example of a semiconductive device whose operation is improved by including a silicon nitride film according to the invention.
  • the device is a photovoltaic cell such as is useful for generation of electricity from sunlight.
  • a substrate body 40 of gallium arsenide is doped to provide relatively high n-type conductivity.
  • On the top surface of body 40 is a thin layer 42 of p-type gallium arsenide, produced for example by liquid epitaxial growth, forming a p-n junction 44 with body 40.
  • a transparent contact layer 45 as of aluminum gallium arsenide is deposited on top of p-type layer 42.
  • a metallic contact 46 is then deposited on a portion of the top surface of layer 45, leaving most of the area open to admit the incident light 48.
  • a second metallic contact 50 covers the entire lower surface of substrate 40. Electrical connecting leads 52 carry off the photocurrent generated between electrodes 46 and 50.
  • the p-type layer 42 is formed to have a band-gap to absorb incident light 48 and convert its energy to generate charge carriers in layer 42. The carriers diffuse to p-n junction 44 to create the output current.
  • a film 54 of silicon nitride is deposited from AZS to cover the top and sides of the cell.
  • Film 54 protects the surface and insulates surface leakage paths.
  • Film 54 in this application is also primarily an anti-reflection coating.
  • the refractive index has been measured as 2.07, which is a desirable value for preventing reflections from gallium arsenide or aluminum gallium arsenide.
  • the film's optical thickness is selected to be about 1/4 wavelength of light so that reflections from the top and bottom surfaces of the silicon nitride will cancel. A thickness of around 1,000 Angstroms has been found to be desirable.
  • inventive films may be profitable used in many other kinds of semiconductive devices, such as integrated circuits, and also for non-electrical uses as protective and antireflection films.
  • My improved silicon nitride films may be used in MIS (metal-insulator-silicon) integrated circuits as insulating layers. They may also be used as masking material for ion implantation. While my inventive films are chemically more stable than the prior art films, they cay be etched, for example, by a plasma etch using oxygen and tetrafluoro-methane.
  • the invention is intended to be limited only by the following claims and their legal equivalents.

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Abstract

A dense film of silicon nitride is deposited by a plasma discharge in a vapor of azidotrimethylsilane (AZS) (CH3)3 SiN3. AZS is less reactive and easier to handle than the previously used silane SiH4. The resulting film is more stable chemically than the silicon nitride produced by other processes. It is useful for protective and anti-reflective coatings, for insulating, and for masking, particularly on semiconductive devices.

Description

FIELD OF THE INVENTION
The invention pertains to film coatings which may be used, inter alia, for insulating, passivating, protecting or reducing reflections at the surface of semiconductive devices.
PRIOR ART
Silicon nitride (SI3 N4) has become well-known as an insulating and passivating layer for semiconductive devices. Such films are described in the "Handbook of Electronic Materials" Vol. 3, J. T. Milek, Ed. IFI/Plenum, New York (1971). The use of silicon nitride passivating films formed at low temperature to avoid damaging the device is described in "Nitride Film Seals at Low Temperature", Electronics 49, No. 5, page 40 (1974).
The specific use of an electric discharge to deposit silicon nitride from a vapor is described in chapter 9 of "Techniques and Applications of Plasma Chemistry", J. R. Hollahan and A. T. Bell, Ed., John Wiley & Sons, New York (1974).
These prior art methods of depositing silicon nitride have used a vapor of a silane (SiH4) mixed with nitrogen or a gaseous nitrogen compound such as ammonia, as described by R. Gareth and W. Scherber, "Journal of the Electrochemical Society", Vol. 119, page 1248 (1972). However, SiH4 is an extremely reactive, dangerous compound. It reacts violently with air, water, etc. to produce silicon oxides which degrade the nitride layer.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a schematic diagram of a laboratory apparatus for carrying out the inventive process.
FIG. 2 is a schematic cross-section of a photovoltaic cell embodying the inventive film.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
The inventive process and product will be described as employing azidotrimethylsilane (AZS,1) having formula (CH3)3 SiN3. Other vaporizable silicon-nitrogen compounds may, however, be used within the scope of the invention. AZS is a stable compound which does not react with air or water, and is non-explosive. Its vapor pressure is suitable for room temperature operation of the process.
FIG. 1 is a diagram of the apparatus used. The device 6 to be coated is placed on a holder 8 inside a vacuum furnace tube 10, as of quartz. Tube 10 is closed at its open end by a metallic base 12 with a synthetic rubber O-ring 14. The tube 10 is pumped to a good vacuum through port 16 and valve 18 by a conventional vacuum pumping system 20, shown schematically. Then valve 22 is opened, connecting tube 10 to a reservoir vessel 24 containing liquid AZS 26. The AZS vapor 28 is admitted to the reaction tube 10 to a pressure of 0.15 to 0.20 torr. Support block 8 is made of graphite and is heated by a radiant heat lamp 30 outside the tube, thereby heating device 6 to the desired temperature. Temperatures from 100-400 degrees Celsius have been found to be desirable. Reasonable deposition is possible at room temperature, but the film integrity appears to be better at 200 degrees. The deposition rate is also dependent on the substrate temperature, so for reproducible deposition the temperature is preferably controlled. For particular devices comprising tin-soldered contacts, I have found temperatures below 230 degrees to be necessary. The temperature of block 8 is measured by a thermocouple 32 connected to block 8 whose coaxial leads 34 connect to an external temperature meter 36. An electric plasma discharge is formed by applying voltage from a generator 38 of high frequency, such as 13MHz, between the thermocouple lead 34 connecting to support block 8 and an external metallic electrode 40. The AZS is decomposed in the plasma discharge, depositing a film of silicon nitride on the exposed surface of the device 6. For a film thickness of 0.1 microns, about 10 minutes is required with a discharge estimated as 10 watts and 200 degree substrate temperature.
The film produced is exceedingly dense, smooth and free of defects. Surprisingly, these films are chemically more stable than those produced by chemical-vapor-deposition (CVD) or by the aforementioned plasma vapor deposition from mixtures of silane and ammonia. For example, the AZS films are not etched by solutions of hydrofluoric or phosphoric acid, but other silicon nitride films are attacked by them. It is possible that the unexpected chemical inertness of the AZS films is due to the incorporation of methyl (CH3) groups. Some evidence of the presence of methyl groups has been found by an infrared band attributable to the silicon-methyl bond. The improved performance may also be connected with the absence of oxide contaminants such as are readily produced by the reactive silanes. Regardless of the exact chemical mechanism, I have found that my AZS process results in a uniquely stable film not producible by any other process known to me.
As described above azidotrimethylsilane is a well suited material for carrying out the invention. However, other vaporizable organosilicon compounds may well be used. A compound should be selected which does not have silicon-hydrogen bonds because the latter contribute to high reactivity and instability. It is very convenient to have the nitrogen source in chemical combination with the silicon because this eliminates any problem of metering the two components of the silicon nitride. However, it is believed that a separate source of nitrogen, if properly controlled, could produce the desired result. In my AZS vapor, the silicon is bonded only to nitrogen and to the carbon atoms of the methyl groups. Other organic radicals could be substituted for the methyl groups, as long as the vapor pressure does not become too low.
FIG. 2 shows an example of a semiconductive device whose operation is improved by including a silicon nitride film according to the invention. The device is a photovoltaic cell such as is useful for generation of electricity from sunlight. A substrate body 40 of gallium arsenide is doped to provide relatively high n-type conductivity. On the top surface of body 40 is a thin layer 42 of p-type gallium arsenide, produced for example by liquid epitaxial growth, forming a p-n junction 44 with body 40. A transparent contact layer 45 as of aluminum gallium arsenide is deposited on top of p-type layer 42. A metallic contact 46 is then deposited on a portion of the top surface of layer 45, leaving most of the area open to admit the incident light 48. A second metallic contact 50 covers the entire lower surface of substrate 40. Electrical connecting leads 52 carry off the photocurrent generated between electrodes 46 and 50. The p-type layer 42 is formed to have a band-gap to absorb incident light 48 and convert its energy to generate charge carriers in layer 42. The carriers diffuse to p-n junction 44 to create the output current.
According to the invention, a film 54 of silicon nitride is deposited from AZS to cover the top and sides of the cell. Film 54 protects the surface and insulates surface leakage paths. Film 54 in this application is also primarily an anti-reflection coating. The refractive index has been measured as 2.07, which is a desirable value for preventing reflections from gallium arsenide or aluminum gallium arsenide. The film's optical thickness is selected to be about 1/4 wavelength of light so that reflections from the top and bottom surfaces of the silicon nitride will cancel. A thickness of around 1,000 Angstroms has been found to be desirable.
The above embodiment of the invention in a photovoltaic cell has been described only as one example of its utility. It will be obvious to one skilled in the art that the inventive films may be profitable used in many other kinds of semiconductive devices, such as integrated circuits, and also for non-electrical uses as protective and antireflection films. My improved silicon nitride films may be used in MIS (metal-insulator-silicon) integrated circuits as insulating layers. They may also be used as masking material for ion implantation. While my inventive films are chemically more stable than the prior art films, they cay be etched, for example, by a plasma etch using oxygen and tetrafluoro-methane. The invention is intended to be limited only by the following claims and their legal equivalents.

Claims (2)

I claim:
1. A method for depositing a film comprising silicon nitride, said method comprising the steps of:
exposing a substrate to a vapor of azidotrimethylsilane, and creating a plasma discharge in said vapor to deposit said film comprising silicon nitride on said substrate.
2. On a substrate a film comprising silicon nitride deposited by the method of claim 1.
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Cited By (48)

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US4451969A (en) * 1983-01-10 1984-06-05 Mobil Solar Energy Corporation Method of fabricating solar cells
US4585704A (en) * 1979-07-24 1986-04-29 Toshio Hirai Electrically conductive Si3 N4 --C series amorphous material and a method of processing the same
US4679007A (en) * 1985-05-20 1987-07-07 Advanced Energy, Inc. Matching circuit for delivering radio frequency electromagnetic energy to a variable impedance load
US4810637A (en) * 1985-05-07 1989-03-07 Thomson-Csf Non-linear control element for a flat electrooptical display screen and a method of fabrication of said control element
US4863755A (en) * 1987-10-16 1989-09-05 The Regents Of The University Of California Plasma enhanced chemical vapor deposition of thin films of silicon nitride from cyclic organosilicon nitrogen precursors
US4992306A (en) * 1990-02-01 1991-02-12 Air Products Abd Chemicals, Inc. Deposition of silicon dioxide and silicon oxynitride films using azidosilane sources
US5013690A (en) * 1990-02-01 1991-05-07 Air Products And Chemicals, Inc. Method for deposition of silicon films from azidosilane sources
EP0417170A4 (en) * 1988-05-31 1991-06-26 Olin Corporation Process for plasma depositing silicon nitride and silicon dioxide films onto a substrate
EP0481706A1 (en) * 1990-10-16 1992-04-22 Kawasaki Steel Corporation Method of producing CVD silicon oxynitride film
US5116427A (en) * 1987-08-20 1992-05-26 Kopin Corporation High temperature photovoltaic cell
US5234869A (en) * 1990-06-28 1993-08-10 Kabushiki Kaisha Toshiba Method of manufacturing silicon nitride film
US5300951A (en) * 1985-11-28 1994-04-05 Kabushiki Kaisha Toshiba Member coated with ceramic material and method of manufacturing the same
EP0808918A3 (en) * 1996-05-21 1998-10-28 Canon Kabushiki Kaisha Plasma processing apparatus and processing method
US5872054A (en) * 1992-04-16 1999-02-16 Mitsubishi Denki Kabushiki Kaisha Anti-reflection film and method of manufacturing
US6440860B1 (en) 2000-01-18 2002-08-27 Micron Technology, Inc. Semiconductor processing methods of transferring patterns from patterned photoresists to materials, and structures comprising silicon nitride
US6461950B2 (en) 1998-09-03 2002-10-08 Micron Technology, Inc. Semiconductor processing methods, semiconductor circuitry, and gate stacks
US20030054294A1 (en) * 1998-02-25 2003-03-20 Richard Holscher Semiconductor processing methods
US6719919B1 (en) * 1998-12-23 2004-04-13 Micron Technology, Inc. Composition of matter
US6727173B2 (en) 1998-09-03 2004-04-27 Micron Technology, Inc. Semiconductor processing methods of forming an utilizing antireflective material layers, and methods of forming transistor gate stacks
US20040121085A1 (en) * 2002-12-20 2004-06-24 Shulin Wang Method and apparatus for forming a high quality low temperature silicon nitride film
US20040194706A1 (en) * 2002-12-20 2004-10-07 Shulin Wang Method and apparatus for forming a high quality low temperature silicon nitride layer
US20050255714A1 (en) * 2002-12-20 2005-11-17 Applied Materials, Inc. Method for silicon nitride chemical vapor deposition
US7067414B1 (en) 1999-09-01 2006-06-27 Micron Technology, Inc. Low k interlevel dielectric layer fabrication methods
US20060269699A1 (en) * 1998-02-25 2006-11-30 Richard Holscher Semiconductor constructions
US20060286817A1 (en) * 2003-05-26 2006-12-21 Hitoshi Kato Cvd method for forming silicon nitride film
US20070004227A1 (en) * 1999-01-20 2007-01-04 Weimin Li Semiconductor processing methods
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